Title | ||
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Performance Analysis Of A Semiblind Channel Estimator In One-Bit Massive Mimo Systems |
Abstract | ||
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Massive multiple-input multiple-output (MIMO) suffers from RF hardware complexity, cost, and circuit power consumption. The high-resolution analog-to-digital converter (ADC) at the RF front end is one of the major contributors in power depletion. Thus, one-bit massive MIMO becomes an effective solution. However, the availability of accurate channel state information (CSI) at the base station remains a challenging task. In this article, we propose a semiblind channel estimator for one-bit massive MIMO systems and evaluate its uplink (UL) performance. The proposed algorithm consists of two stages: initialization and iteration. The initial channel estimate is obtained from a pilot-aided initialization stage, which is refined in the iteration stage with the help of both pilot and a few data symbols. The semiblind approach simultaneously improves the estimation accuracy and spectral efficiency with minimum pilot length. We also derive a theoretical lower bound on the UL achievable rate under perfect and imperfect CSI. Through simulations, we show that the semiblind scheme achieves a considerable improvement in mean square error, bit-error-rate, spectral efficiency, and bit energy against the existing one-bit pilot based estimators at the cost of a nominal increase in computational complexity. |
Year | DOI | Venue |
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2021 | 10.1109/JSYST.2020.3006780 | IEEE SYSTEMS JOURNAL |
Keywords | DocType | Volume |
MIMO communication, Channel estimation, Radio frequency, Uplink, Estimation, Antennas, Performance analysis, One-bit ADC, one-bit massive MIMO, semiblind channel estimator, spectral efficiency (SE) | Journal | 15 |
Issue | ISSN | Citations |
1 | 1932-8184 | 0 |
PageRank | References | Authors |
0.34 | 0 | 4 |
Name | Order | Citations | PageRank |
---|---|---|---|
Srinivas Boddupelly | 1 | 0 | 0.34 |
Khushboo Mawatwal | 2 | 0 | 0.34 |
Debarati Sen | 3 | 116 | 19.01 |
Saswat Chakrabarti | 4 | 164 | 22.77 |